POULSBO — Centennial Park is getting its due.

The park established to mark the city’s 100-year birthday last year already had a sculpture at the open space at Seventh Ave NE and NE Iverson St.

But now, in addition to two bridges and an observation deck built by Poulsbo service clubs, the park has two pergolas with stone bases and picnic tables.

The pergolas were designed after Norwegian outdoor architecture, said Brad Pugh and Laurie Larson, the landscape architect duo responsible for most of the improvements at the park.

On Wednesday Larson and Pugh puzzled together the stone mortar bases on the structure.

“We keep putting stones in until they fit,” said Larson. “And we have piles of stones to go through.”

Pugh said the design came after investigating several different ideas.

“We just modeled it after what ever we could find,” Pugh said, noting that many designs had the outdoor structures with sod roofs.

Larson designed the cement and steel “Three Trees” sculpture at the corner along with co-designer Wendy Armstrong.

The posts are fir, which will turn black with age. The beams and rafters are cedar, which will turn silverish grey with age.

And the wood, milled by Smyth Mill in Indianola, is “true,” said Pugh, in that it is not milled down as most lumber bought at home improvement stores.

“So it doesn’t look like it came from a box store,” Pugh said.

City Parks Director Mary McCluskey said other recent improvements included two bridges and an observation deck, built by volunteers from the Rotary Club of Poulsbo-North Kitsap and the Poulsbo Noon Lions.

This year the city has spent about $50,000 on the park, and despite a lean budget year expected in 2010, about $37,500 has been budgeted, McCluskey said. A rental house still sits on the property, and the city’s master plan calls for it to be demolished to clear more space for the public. However, with money being scarce, McCluskey said the city doesn’t know when it can afford to tear the house down — it is currently occupied — and hopes to use volunteer labor next year to complete more improvements.

The parking lot had originally been hemmed in with large rocks. McCluskey said their purpose was to keep vandals from driving on the cleared land. The rocks will be repositioned and trees planted.

“It was there for a functional reason, now we’re going to make it look good,” McCluskey said.